package com.hmdp.utils;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
@Slf4j
public class RedisIdWorker {
    /**
     * 开始时间戳
     */
    private static final long BEGIN_TIMESTAMP = 1640995200L;
    private static final int COUNT_BASE = 32;

    @Autowired
    private StringRedisTemplate redisTemplate;



    public long nextId(String keyPrefix){
        //1生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSecond - BEGIN_TIMESTAMP;
        //生成序列号
        //获取当前时间 精确到天
        String date = now.format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        //自增
       log.info(redisTemplate.toString());
        long count = redisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);
        log.info("count = " + count);
        //拼接
        return timestamp << COUNT_BASE | count;
    }





    public static void main(String[] args) {

        LocalDateTime time = LocalDateTime.of(2022, 1, 1, 0, 0, 0);
        long l = time.toEpochSecond(ZoneOffset.UTC);
        System.out.println(l);
    }
}
